高等继续教育 / 高级英语II
正确率：100%
题型描述: 单选题
Some scientists think that trial-and-error methods help to show how intelligent ＿＿＿＿＿＿.
A.si an animal
B.an animal is
C.an animal be
D.will an animal be
Some scientists think that trial-and-error methods help to show how intelligent ＿＿＿＿＿＿.
A.si an animal
B.an animal is
C.an animal be
D.will an animal be
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